I know this is easy to say, but not easy to do. But, be patient. I know after my separation/divorce process (4 years), I was almost desperate at times to prove that I could nurture a healthy marriage and be a great husband and provider. That desperation to prove, that need to be needed and to fill that hole of loneliness, just lead to more hurt. What I lacked at the time was the Gospel and a healthy dose of patience.
In my own experience I was in way too much of a hurry. I had an idealization of what I wanted in a wife and tried to make the women I dated into that idealization. In a way, trying to pound a square peg into a round hole. That attitude just led to more heartbreak and loneliness.
I myself am a new member. I cannot have anymore children and accepted the fact when it came to be baptized that it would be a long while before I meet a woman with the same beliefs as I who will marry me. I know exactly where your coming from in that department.
Is being alone tough? Yes
Is being a single parent difficult? INCREDIBLY (I have a son)
But for me, my focus now is my growth in the Gospel and my relationship with Heavenly Father, Jesus Christ and the Holy Ghost. And then when Heavenly Father feels that I'm ready for a spouse and my future spouse is ready for me, then we will be introduced and that still small voice will guide us towards an eternal marriage.
All I can say is focus on your family, your studies and you. Keep the faith that when the time is right, it will be obvious to you.